Use Id type to make namespaces explicit part of node identity

instant-xml-macros/src/de.rs

@@ -156,10 +156,10 @@ impl Deserializer {
                         use ::instant_xml::de::Node;
 
                         #declare_values
-                        while let Some(( key, _ )) = deserializer.peek_next_attribute() {
+                        while let Some(attr) = deserializer.peek_next_attribute()? {
                             let attr = {
                                 #attributes_consts
-                                match *key {
+                                match attr.id {
                                     #attributes_names
                                     _ => __Attributes::__Ignore
                                 }
@@ -167,16 +167,17 @@ impl Deserializer {
 
                             match attr {
                                 #attr_type_match
-                                __Attributes::__Ignore => todo!(),
+                                __Attributes::__Ignore => {}
                             }
                         }
 
                         while let Some(node) = deserializer.peek_next_tag()? {
                             match node {
                                 Node::Open { ns, name } => {
+                                    let id = ::instant_xml::Id { ns, name };
                                     let element = {
                                         #elements_consts
-                                        match name {
+                                        match id {
                                             #elements_names
                                             _ => __Elements::__Ignore
                                         }
@@ -184,7 +185,9 @@ impl Deserializer {
 
                                     match element {
                                         #elem_type_match
-                                        __Elements::__Ignore => panic!("No such element"),
+                                        __Elements::__Ignore => {
+                                            deserializer.ignore(id)?;
+                                        }
                                     }
                                 }
                                 Node::Close { name } => {
@@ -216,7 +219,10 @@ impl Deserializer {
         ));
 
         out.extend(quote!(
-            const KIND: ::instant_xml::Kind = ::instant_xml::Kind::Element(#name);
+            const KIND: ::instant_xml::Kind = ::instant_xml::Kind::Element(::instant_xml::Id {
+                ns: #default_namespace,
+                name: #name,
+            });
         ));
 
         out = quote!(
@@ -247,8 +253,24 @@ impl Deserializer {
         let enum_name = Ident::new(&format!("__Value{index}"), Span::call_site());
         tokens.enum_.extend(quote!(#enum_name,));
 
+        let default_ns = match &field_meta.ns.default {
+            Namespace::Default => &container_meta.ns.default,
+            _ => &field_meta.ns.default,
+        };
+
+        let ns = match default_ns {
+            Namespace::Default => "",
+            Namespace::Prefix(prefix) => match container_meta.ns.prefixes.get(prefix) {
+                Some(ns) => ns,
+                None => panic!("undefined prefix {prefix} in xml attribute"),
+            },
+            Namespace::Literal(ns) => ns,
+        };
+
         tokens.consts.extend(quote!(
-            const #const_field_var_str: &str = <#no_lifetime_type>::KIND.name(#field_var_str);
+            const #const_field_var_str: ::instant_xml::Id<'static> = <#no_lifetime_type>::KIND.name(
+                ::instant_xml::Id { ns: #ns, name: #field_var_str }
+            );
         ));
 
         if !field_meta.attribute {
@@ -265,20 +287,6 @@ impl Deserializer {
             let mut #enum_name: Option<#no_lifetime_type> = None;
         ));
 
-        let default_ns = match field_meta.ns.default {
-            Namespace::Default => &container_meta.ns.default,
-            _ => &field_meta.ns.default,
-        };
-
-        let new_default_ns = match default_ns  {
-            Namespace::Default => quote!(None),
-            Namespace::Prefix(prefix) => match container_meta.ns.prefixes.get(prefix) {
-                Some(ns) => quote!(Some(#ns)),
-                None => panic!("invalid prefix for xml attribute"),
-            },
-            Namespace::Literal(ns) => quote!(Some(#ns)),
-        };
-
         if !field_meta.attribute {
             tokens.match_.extend(quote!(
                 __Elements::#enum_name => {
@@ -286,10 +294,6 @@ impl Deserializer {
                         panic!("duplicated value");
                     }
 
-                    if Some(ns) != #new_default_ns {
-                        return Err(Error::WrongNamespace);
-                    }
-
                     #enum_name = Some(<#no_lifetime_type>::deserialize(deserializer)?);
                 },
             ));

instant-xml/src/de.rs

@@ -1,16 +1,16 @@
 use std::collections::HashMap;
 use std::iter::Peekable;
 
-use super::Error;
+use super::{Error, Id};
 use xmlparser::{ElementEnd, Token, Tokenizer};
 
 pub struct Deserializer<'xml> {
     parser: Peekable<XmlParser<'xml>>,
     def_namespaces: HashMap<&'xml str, &'xml str>,
-    parser_namespaces: HashMap<&'xml str, &'xml str>,
+    pub parser_namespaces: HashMap<&'xml str, &'xml str>,
     def_default_namespace: &'xml str,
     parser_default_namespace: &'xml str,
-    tag_attributes: Vec<(&'xml str, &'xml str)>,
+    tag_attributes: Vec<Attribute<'xml>>,
     next_type: EntityType,
 }
 
@@ -54,6 +54,23 @@ impl<'xml> Deserializer<'xml> {
         }))
     }
 
+    pub fn id(&self, item: &TagData<'xml>) -> Result<Id<'xml>, Error> {
+        let ns = match (item.ns, item.prefix) {
+            (Some(_), Some(_)) => return Err(Error::WrongNamespace),
+            (Some(ns), None) => ns,
+            (None, Some(prefix)) => match self.parser_namespaces.get(prefix) {
+                Some(ns) => ns,
+                None => return Err(Error::WrongNamespace),
+            },
+            (None, None) => "",
+        };
+
+        Ok(Id {
+            ns,
+            name: &item.key,
+        })
+    }
+
     // Check if defined and gotten namespaces equals for each field
     pub fn compare_namespace(
         &self,
@@ -72,8 +89,27 @@ impl<'xml> Deserializer<'xml> {
         }
     }
 
-    pub fn peek_next_attribute(&self) -> Option<&(&'xml str, &'xml str)> {
+    pub fn peek_next_attribute(&self) -> Result<Option<AttributeNode<'xml>>, Error> {
-        self.tag_attributes.last()
+        let attr = match self.tag_attributes.last() {
+            Some(attr) => attr,
+            None => return Ok(None),
+        };
+
+        let ns = match attr.prefix {
+            Some(key) => match self.parser_namespaces.get(key) {
+                Some(ns) => ns,
+                None => return Err(Error::WrongNamespace),
+            },
+            None => self.parser_default_namespace,
+        };
+
+        Ok(Some(AttributeNode {
+            id: Id {
+                ns,
+                name: attr.local,
+            },
+            value: attr.value,
+        }))
     }
 
     pub fn deserialize_struct<V>(
@@ -204,10 +240,34 @@ impl<'xml> Deserializer<'xml> {
         V: Visitor<'xml>,
     {
         match self.tag_attributes.pop() {
-            Some((_, value)) => visitor.visit_str(value),
+            Some(attr) => visitor.visit_str(attr.value),
             None => Err(Error::UnexpectedEndOfStream),
         }
     }
+
+    pub fn ignore(&mut self, id: Id<'xml>) -> Result<(), Error> {
+        let mut levels = 0;
+        while let Some(result) = self.parser.next() {
+            match result? {
+                XmlRecord::Open(item) => {
+                    if self.id(&item)? == id {
+                        levels += 1;
+                    }
+                }
+                XmlRecord::Close(item) => {
+                    if item == id.name {
+                        levels -= 1;
+                        if levels == 0 {
+                            return Ok(());
+                        }
+                    }
+                }
+                _ => {}
+            }
+        }
+
+        Ok(())
+    }
 }
 
 pub struct XmlParser<'xml> {
@@ -272,12 +332,12 @@ impl<'xml> Iterator for XmlParser<'xml> {
         let mut attributes = Vec::new();
 
         loop {
-            let item = match self.iter.next() {
+            let token = match self.iter.next() {
                 Some(v) => v,
                 None => return None,
             };
 
-            match item {
+            match token {
                 Ok(Token::ElementStart { prefix, local, .. }) => {
                     key = Some(local.as_str());
                     prefix_ret = match prefix.is_empty() {
@@ -319,12 +379,13 @@ impl<'xml> Iterator for XmlParser<'xml> {
                     } else if prefix.as_str() == "xmlns" {
                         // Namespaces
                         namespaces.insert(local.as_str(), value.as_str());
-                    } else if prefix.is_empty() {
-                        // Other attributes
-                        attributes.push((local.as_str(), value.as_str()));
                     } else {
-                        // TODO: Can the attributes have the prefix?
+                        let prefix = (!prefix.is_empty()).then_some(prefix.as_str());
-                        todo!();
+                        attributes.push(Attribute {
+                            prefix,
+                            local: local.as_str(),
+                            value: value.as_str(),
+                        });
                     }
                 }
                 Ok(Token::Text { text }) => {
@@ -349,20 +410,34 @@ pub trait Visitor<'xml>: Sized {
     }
 }
 
+#[derive(Debug)]
 pub enum XmlRecord<'xml> {
     Open(TagData<'xml>),
     Element(&'xml str),
     Close(&'xml str),
 }
 
+#[derive(Debug)]
 pub struct TagData<'xml> {
     pub key: &'xml str,
-    pub attributes: Vec<(&'xml str, &'xml str)>,
+    pub attributes: Vec<Attribute<'xml>>,
     pub ns: Option<&'xml str>,
     pub prefixes: HashMap<&'xml str, &'xml str>,
     pub prefix: Option<&'xml str>,
 }
 
+pub struct AttributeNode<'xml> {
+    pub id: Id<'xml>,
+    pub value: &'xml str,
+}
+
+#[derive(Debug)]
+pub struct Attribute<'xml> {
+    pub prefix: Option<&'xml str>,
+    pub local: &'xml str,
+    pub value: &'xml str,
+}
+
 pub enum Node<'xml> {
     Open { ns: &'xml str, name: &'xml str },
     Close { name: &'xml str },

instant-xml/src/lib.rs

@@ -48,18 +48,24 @@ pub trait FromXml<'xml>: Sized {
 
 pub enum Kind {
     Scalar,
-    Element(&'static str),
+    Element(Id<'static>),
 }
 
 impl Kind {
-    pub const fn name(&self, field: &'static str) -> &'static str {
+    pub const fn name<'a>(&self, field: Id<'static>) -> Id<'static> {
         match self {
             Kind::Scalar => field,
-            Kind::Element(name) => name,
+            Kind::Element(name) => *name,
         }
     }
 }
 
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
+pub struct Id<'a> {
+    pub ns: &'a str,
+    pub name: &'a str,
+}
+
 pub trait FromXmlOwned: for<'xml> FromXml<'xml> {}
 
 #[derive(Clone, Debug, Eq, Error, PartialEq)]

instant-xml/tests/de-direct.rs

@@ -26,7 +26,7 @@ fn direct_namespaces() {
             "<StructDirectNamespace xmlns=\"URI\"><flag xmlns=\"WRONG\">true</flag></StructDirectNamespace>"
         )
         .unwrap_err(),
-        Error::WrongNamespace
+        Error::MissingValue
     );
 
     // Wrong direct namespace - missing namespace
@@ -35,6 +35,6 @@ fn direct_namespaces() {
             "<StructDirectNamespace xmlns=\"URI\"><flag>true</flag></StructDirectNamespace>"
         )
         .unwrap_err(),
-        Error::WrongNamespace
+        Error::MissingValue
     );
 }

instant-xml/tests/de-ns.rs

@@ -75,7 +75,7 @@ fn default_namespaces() {
     // Wrong child namespace
     assert_eq!(
         StructWithWrongNestedNamespace::from_xml("<StructWithWrongNestedNamespace xmlns=\"URI\" xmlns:dar=\"BAZ\"><NestedWrongNamespace><flag>true</flag></NestedWrongNamespace></StructWithWrongNestedNamespace>").unwrap_err(),
-        Error::WrongNamespace
+        Error::MissingValue
     );
 }
 
@@ -118,7 +118,7 @@ fn other_namespaces() {
             "<NestedOtherNamespace xmlns=\"URI\" xmlns:bar=\"WRONG\"><bar:flag>true</bar:flag></NestedOtherNamespace>"
         )
         .unwrap_err(),
-        Error::WrongNamespace
+        Error::MissingValue
     );
 
     // Other namespace not-nested - missing parser prefix
@@ -127,7 +127,7 @@ fn other_namespaces() {
             "<NestedOtherNamespace xmlns=\"URI\" xmlns:bar=\"BAR\"><flag>true</flag></NestedOtherNamespace>"
         )
         .unwrap_err(),
-        Error::WrongNamespace
+        Error::MissingValue
     );
 
     // Correct child other namespace